# Need your guys honest opinion **URL:** \ **Category:** Shift518 Automotive\ **Created:** [June 7, 2011, 1:23pm UTC](https://forums.speedlife.net/t/need-your-guys-honest-opinion/258811 "2011-06-07T13:23:08Z")\ **Posts on this page:** 1\ **Showing post:** 28
**Author:** ![RocketPunch](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/rocketpunch/32/6429_2.png) [@RocketPunch](https://forums.speedlife.net/u/RocketPunch)\ **Post date:** [June 9, 2011, 7:33pm UTC](https://forums.speedlife.net/t/need-your-guys-honest-opinion/258811/28 "2011-06-09T19:33:07Z")
> [@IM CALLING YOU OUT FIREHAWK853!!!](https://forums.speedlife.net/t/im-calling-you-out-firehawk853/42858/229): > > im 100% positive its the check engine light. > > i called him today and he said that if the bike idles or luggs then some exhaust valve closes and the check engine light comes on I searched for a bit. It seems to be a common problem which had something to do with the EXUP valve got stuck; it might also show a code 18. > [@R6 message net](#): > > If you want to see what I’m talking about, take off that black cowl at the base of the exhaust pipe right behind the right foot peg, then you will be able to see the valve im talking about and the cables attatched to it, but I wouldnt recommend playing with them, take it to the dealer and tell them specifically what the deal is but i dont know what theyll be able to do. Another thing to keep in mind is that if you get any aftermarket exhaust, even just a slip on, you take that valve out completely, so it wont even be an issue, you take away the cables and everything, but you leave the servo motor in place that drives them. Once all the junk is out of the way, I would assume you would just have to go through the code pages in the computer and clear that code 18, again, something the dealer could do if you dont want to fool with it. Anyone please correct me if i’m spouting bad info! Hope this helps man! From what I read, even people have stock exhaust have this problem. --- _[View the full topic](https://forums.speedlife.net/t/need-your-guys-honest-opinion/258811)._